Doctor prescribed me omnacortil 40 mg.

Need help, going through medication for breathing issue and cough, we did blood test and found i have high IGE. Doctors prescribed few medicines. I aas prescribed with omnacortil 40 mg for 3 days then 30mg for 3 days then 20 mg and 10 mg and 5 mg for 3 days each respectively. I have finished 30 mg yesterday and have not yaken the medicine today because m facing difficulties like blurred vision and confussion and altered alertness and m feeling very weak today. I really need some ones help here. I was also prescribed with histafree m which i syopped 2 days prior and was also prescribed with L cin 500 for 5 days which i have completed and one other medicine which m still taking is zincovit. Is this all happening because of the medicine or do i have any other problem.